Improved sdsbw-threading machine



Leiters Patent Naseem', manly 14, 1868.

-IMPnov-:D sennW-TunsADNG MACHINE.

diie rlgshule' rtferreh tu' in time Entert atnit'mrh making mit ut tlg; Samt.

4fro' ALL wHoM' IT MAYooNoEnN :,1

'Be it known that I, Ez'lltA-GOULD, lewark, in -thefcount-y of Essex, inthe State of New Jersey,h`ave `invented a-newand improved ltiaehine forl Cutting Threads. `on Bolts and Nuts; and I her'ebyde'clare the fol.

lowingto be -a full, clar, and exact description, enabling those skilled in the art to make and use the same,

`reference being had to the accompanying drawing, forming part of this specification, in'which drawing- 4 Figureulrepresentsa Vlongitudinal section-of. this inventio'nfwithout the chuck Vfor. cuttingnuts. vFigureQ is a. simlarsection ofthe same with the chuck for'cutting nuts. 4Figure 3 is a sectional pian thereof, i l

Figure 4 is a.transversesection thereotf-th'cline x,in g.'2,.indicating the pianeof section.

Sirnilarletters indicate corresponding parts. This invention relates to o. machine'for cutting-threads on bolts and4 nuts, which is principellyvcomposed of two -holllow spindles, one working inside the other, and lconnected by a clutch, which permits the inner spindle" to make a portionof o.a revolution before tll'outer spindle. is compelled to move with it. To one end'of4 thev inner spindle is secureda chuck, provided with radial grooves forA mortises, into which the dies are tted, and' its other end is provided-with a. screw-thread and nut, which serve to holdthedies in their proper place. By releasing this nut,the inri'erspin'dle can be broughtiu'such a positionthat the dies canbe taken out.

The outerV ends of the dies work .againstv cams ,in the interiorl of an openhead secured to then'end the outer spindle, yso that,'h v turning the inner'spindlc in the proper direction independent ofthe outer spindle, the diesare gradually forced in towards the common cent-reef the two spindles. Thtdistance-t'owhich the dies' are moved isfdetermined the clutchiwhich permits the inner' spindle to make apartialrrevolution independent of the outer spindleThis outerspindle is retained bya frictioustrap,.wh'ioh'is adjusted so thatit prevents` Vsaid spindle being-.moved by thefriction offthejnner spindle. "For .cutting nuts, an additional chuckl is secured 4to the end of the .inner spindle hy afscrewd'od passing` through said spindle. The' bol-t tobe`cut, o1"` the net to be tapped, is secured in a .sliding head,rwhich'is forced upto'wards' the ehuclrcontainirfg thedies orfthe tap by a clutch-lever, the construction of which will be hereinafter more' f uily described. f v

Y "A" represents a. frame, fromwhichl rises a Vhead-block, B, that forms thebearing for a hollow spindie,-C.

One endet' thisspin'dle forms an opeii head, D, and on its'opposite-end is'securerd a disli,`E, which is provided 'witha segmental projection, to' engage,V .with a.' similar" projection, b, on the hub of a cog-wheel, F, which is mounted on the end of a spindle, G. `This spindle is also, hollow,- and Vit extends th'roughthe main spindle C, beingfurnishedwitha chuck, H, that isgturned od` to dt into the open head, D, ofthe main spindle. 'p

' Said chuck-is provided with radial slots or mortises, c, to receive'the dies d.) The outer ends oi'- these dies :b ear against c ams e, inthe interior of' the head, D; and these cams areof such a shaperthnt, turningtheVV inner spindle in the proper direction, independent of the outer spindle, the dies are forced in towards the common centreof 4the twoA spindles, thcrrequired distance being regulated bythe segmental projections a In. From the `inner edges of thedies projectpinsf, which catch into camfgrooves g, in the innerlsurfaceof the head, D; and

these Acam-grooves are so shapedthat, by turning the -inner` spindle in the proper direction independent off-the outer spindlefthe dies are opened, and saidcam-groovcs are arranged in'such relationA to the'cams e that, by turning; the linner spindle in one direction, the dies will close, and', byt'urning it in the opposite direction, the d ieswill open. The amount ot' motion allowed tojthe inner spidle, independent of the outer spindle, is determined by-thesegmental projections@ on the-disk E and cog-wheel F, said projections being so proportioned' that, vwhen theA dies have closed to the desired distance, the projection b .of'rthelwheel will strike `the projection d of `thcpdisldand the outer spindle4 Cy will then lie-carried along, and be caused'toV turn withfthe in ner spindle.;

Byfadjusting thecog-'wheel F, `with itsprojection vb, the ,time when the` outer spindle is' carriedfrward withtho i inner' spindle can be' changed'r `By these mea-ns, the dieszare iirnily reta-ined in their'closed position, and :1 -bolt introduced between themis cut uniformly to anydes'ired distance. ABy reversing the motion of theinner spindle,

the projection a is relieved t'iom the Vaction of' the `project-ion and the outer spindle reinansat rest until the dies have opened to the required distance.' A t th'at point, theiprojection b comes again in contact with the projection a, and theou'tcr'spindle is carried along with the inner spindle.

The heed, D, onthe spindle C is subjected tothe action of' a friction-strap, I, which is so adjusted that it prevents said spindle from turning by the mere friction of the inner spindle.

Theholt on which the thread is to be' cutis secured in a head-block, J, which slides on suitable ways formed ,by the framel A, nndwhich is forced towards the dies by a- `lever, K. This levervis connected to a. slide-,`L, which is fitted to the guideways of the frame A, the connection between the lever and the slide being effected by n pivot, 7L, which passesthrough an oblong slot, Z, in the slide, and connectsiwith a lever-jamie, which is situated under the slide, n'nd has its fulcrum on a pivot, n.

When the lever K-is turned in the direction of the arrow marked .near it in iig. 3, the slide L becomes loose, and can be movedfreely on the guide-ways but, when the slide yisl brought lclose up to the head-block J,. and

the lever 'K is gradually brought intothe position lshown in iig. 3, the lever-jawm clamps" the ,guide-ways ofthe frame, and retains 4the slide L iirmly in position, and, at the'sumc time, the toe of the lever K bears against the head-block@ and forces the same up'towards the chuck H. Byvthesemeens, the bolt is made to enter the dies. IAs soon as the dies begin Yto cut, they-'draw the holt in automatically. For tapping nuts, I secure, to the en d of the inner spindle-G, a chuck, M, (see fig. 2,) which is provided with `suiteble jaws, between which'th'e tap can be secured. Saidchuck is fastened to the spindle hy a screw-rod, N, which extends clear througlrthe spindle, alnd screws'int-o a. 'thread cut into a tubular projection at the inner surfaceof thechuck. Suitable-studs or projeetions, rising from the outer lfoce of `thechuck H,.and catching iti-corresponding-cavities in the inner surface of the chuck M, prevent this letter chuck from turning round when the `rod N is screwed in.l The nut tobetepped is securedin the heed-block J, and forced up against the-tap bythe lever K.

The motion of the spindle G is produced by n pinion, O, which'g'ears into the cog-wheel F, and 'which is mounted in fashaft,`P, to which the required motion is impart-ed bye belt or any other suitable means 5' and the cogvvheel F is retained in position by a nut,Q, which screws on the4 end ofthe spindle-Gr.` By unscrewing'this .nut a sliort dista'nc`e,vthespindle G can be pushed out far enough to allow of taking out orputting in the dies d..

I Bythis arrangement, the operation of cuttingthreads on bolts or in nuts is materially facilitated.

Having ,thus described my invention, what I claim as fnew, anddesire to secure'by Letters Patent, is-

11. The arrangement, herein described, loi' the driving-wheel F, concentric spindles G C,end projections a b,

for the purpose setforth. *Y

2K. The combination of the vlever K- and'slide L, secured one ,to the other'by n pivot', v7L, which moves i'n a.

-, slot, Z, with'the lever-jaw m, frauiefA, and head-block J, ell constructed, arranged, and operating substantially esV and forthe purpose described.

' EZRA GOULD. Witnesses v F. H.v Gouw,

C. HALsEY CANMELD.. 

